body{
    background: url(../img/2040889.jpg) no-repeat;
    background-size: cover;
    display: flex;
    justify-content: center;
}
.home{
    margin-top: 100px;
    width: 1000px;
    height:700px;
    background-color: rgba(250,250,250,0.5);
}
ul{
    float: left;
    line-height: 35px;
    list-style-type: none;
}
ul a{
    color: crimson;
    text-decoration: none;
}
header{
    padding: 20px;
    border-bottom: 1px solid deepskyblue;
}
header a{
    color: gold;
    text-decoration: none;
}
aside{
    height:639px;
    line-height: 30px;
    margin-left: 200px;
    border-left: 1px dotted deepskyblue;
}
.tab1{
    text-align: center;
}
.tab2{
    margin-top: 30px;
    text-align: center;
    border: 1px solid  #ffa27b;
}
.tr1{
    color: white;
   background-color:  #ffa27b;
}
.tr1 td{
    padding: 10px;
}
.tr2 td{
    border: 1px solid  #ffa27b;
    padding: 6px;
}
.home_table{
    margin-left: 100px;
}
